Melbourne radio station 3AW this morning reported that QF5 SYD-FRA was delayed by more than 9 hrs yesterday. Initially a 2 hr delay was caused due to "technical difficulties" the plane then left the International Terminal but was recalled after a bomb threat note was found in the Terminal.
A search of the aircraft by Police using dogs found no trace of explosives and the flight departed after a further delay of 7 hours.
I can find no trace of this news item on the web, but QANTAS flight status page has the flight departing SIN at 07:19 this morning when it should have left at 22:55 last night. This flight is code-shared with BA as BA7305.